<!DOCTYPE html>
<html lang="zh" dir="ltr" class="client-nojs">
<head>
<title>std::regex_search</title>
<meta charset="UTF-8">
<meta name="generator" content="MediaWiki 1.21.2">
<link rel="shortcut icon" href="../../../common/favicon.ico">
<link rel="stylesheet" href="../../../common/ext.css">
<meta name="ResourceLoaderDynamicStyles" content="">
<link rel="stylesheet" href="../../../common/site_modules.css">
<style>a:lang(ar),a:lang(ckb),a:lang(fa),a:lang(kk-arab),a:lang(mzn),a:lang(ps),a:lang(ur){text-decoration:none}#toc{display:none}.editsection{display:none}
/* cache key: mwiki1-mwiki_zh_:resourceloader:filter:minify-css:7:15cea3ec788a65b5187d4018eed543bf */</style>

<script src="../../../common/startup_scripts.js"></script>
<script>if(window.mw){
mw.config.set({"wgCanonicalNamespace":"","wgCanonicalSpecialPageName":false,"wgNamespaceNumber":0,"wgPageName":"cpp/regex/regex_search","wgTitle":"cpp/regex/regex search","wgCurRevisionId":55766,"wgArticleId":3535,"wgIsArticle":true,"wgAction":"view","wgUserName":null,"wgUserGroups":["*"],"wgCategories":[],"wgBreakFrames":false,"wgPageContentLanguage":"zh","wgSeparatorTransformTable":["",""],"wgDigitTransformTable":["",""],"wgDefaultDateFormat":"zh","wgMonthNames":["","1月","2月","3月","4月","5月","6月","7月","8月","9月","10月","11月","12月"],"wgMonthNamesShort":["","1月","2月","3月","4月","5月","6月","7月","8月","9月","10月","11月","12月"],"wgRelevantPageName":"cpp/regex/regex_search","wgUserVariant":"zh","wgRestrictionEdit":[],"wgRestrictionMove":[]});
}</script><script>if(window.mw){
mw.loader.implement("user.options",function(){mw.user.options.set({"ccmeonemails":0,"cols":80,"date":"default","diffonly":0,"disablemail":0,"disablesuggest":0,"editfont":"default","editondblclick":0,"editsection":0,"editsectiononrightclick":0,"enotifminoredits":0,"enotifrevealaddr":0,"enotifusertalkpages":1,"enotifwatchlistpages":0,"extendwatchlist":0,"externaldiff":0,"externaleditor":0,"fancysig":0,"forceeditsummary":0,"gender":"unknown","hideminor":0,"hidepatrolled":0,"imagesize":2,"justify":0,"math":1,"minordefault":0,"newpageshidepatrolled":0,"nocache":0,"noconvertlink":0,"norollbackdiff":0,"numberheadings":0,"previewonfirst":0,"previewontop":1,"quickbar":5,"rcdays":7,"rclimit":50,"rememberpassword":0,"rows":25,"searchlimit":20,"showhiddencats":0,"showjumplinks":1,"shownumberswatching":1,"showtoc":0,"showtoolbar":1,"skin":"cppreference2","stubthreshold":0,"thumbsize":2,"underline":2,"uselivepreview":0,"usenewrc":0,"watchcreations":0,"watchdefault":0,"watchdeletion":0,
"watchlistdays":3,"watchlisthideanons":0,"watchlisthidebots":0,"watchlisthideliu":0,"watchlisthideminor":0,"watchlisthideown":0,"watchlisthidepatrolled":0,"watchmoves":0,"wllimit":250,"variant":"zh","language":"zh","searchNs0":true,"searchNs1":false,"searchNs2":false,"searchNs3":false,"searchNs4":false,"searchNs5":false,"searchNs6":false,"searchNs7":false,"searchNs8":false,"searchNs9":false,"searchNs10":false,"searchNs11":false,"searchNs12":false,"searchNs13":false,"searchNs14":false,"searchNs15":false,"gadget-MathJax":1,"gadget-ColiruCompiler":1});;},{},{});mw.loader.implement("user.tokens",function(){mw.user.tokens.set({"editToken":"+\\","patrolToken":false,"watchToken":false});;},{},{});
/* cache key: mwiki1-mwiki_zh_:resourceloader:filter:minify-js:7:258d7cd6aa9aa67dee25e01fb6a9e505 */
}</script>
<script>if(window.mw){
mw.loader.load(["mediawiki.page.startup","mediawiki.legacy.wikibits","mediawiki.legacy.ajax"]);
}</script>
<style type="text/css">/*<![CDATA[*/
.source-cpp {line-height: normal;}
.source-cpp li, .source-cpp pre {
	line-height: normal; border: 0px none white;
}
/**
 * GeSHi Dynamically Generated Stylesheet
 * --------------------------------------
 * Dynamically generated stylesheet for cpp
 * CSS class: source-cpp, CSS id: 
 * GeSHi (C) 2004 - 2007 Nigel McNie, 2007 - 2008 Benny Baumann
 * (http://qbnz.com/highlighter/ and http://geshi.org/)
 * --------------------------------------
 */
.cpp.source-cpp .de1, .cpp.source-cpp .de2 {font: normal normal 1em/1.2em monospace; margin:0; padding:0; background:none; vertical-align:top;}
.cpp.source-cpp  {font-family:monospace;}
.cpp.source-cpp .imp {font-weight: bold; color: red;}
.cpp.source-cpp li, .cpp.source-cpp .li1 {font-weight: normal; vertical-align:top;}
.cpp.source-cpp .ln {width:1px;text-align:right;margin:0;padding:0 2px;vertical-align:top;}
.cpp.source-cpp .li2 {font-weight: bold; vertical-align:top;}
.cpp.source-cpp .kw1 {color: #0000dd;}
.cpp.source-cpp .kw2 {color: #0000ff;}
.cpp.source-cpp .kw3 {color: #0000dd;}
.cpp.source-cpp .kw4 {color: #0000ff;}
.cpp.source-cpp .co1 {color: #909090;}
.cpp.source-cpp .co2 {color: #339900;}
.cpp.source-cpp .coMULTI {color: #ff0000; font-style: italic;}
.cpp.source-cpp .es0 {color: #008000; font-weight: bold;}
.cpp.source-cpp .es1 {color: #008000; font-weight: bold;}
.cpp.source-cpp .es2 {color: #008000; font-weight: bold;}
.cpp.source-cpp .es3 {color: #008000; font-weight: bold;}
.cpp.source-cpp .es4 {color: #008000; font-weight: bold;}
.cpp.source-cpp .es5 {color: #008000; font-weight: bold;}
.cpp.source-cpp .br0 {color: #008000;}
.cpp.source-cpp .sy0 {color: #008000;}
.cpp.source-cpp .sy1 {color: #000080;}
.cpp.source-cpp .sy2 {color: #000040;}
.cpp.source-cpp .sy3 {color: #000040;}
.cpp.source-cpp .sy4 {color: #008080;}
.cpp.source-cpp .st0 {color: #008000;}
.cpp.source-cpp .nu0 {color: #000080;}
.cpp.source-cpp .nu6 {color: #000080;}
.cpp.source-cpp .nu8 {color: #000080;}
.cpp.source-cpp .nu12 {color: #000080;}
.cpp.source-cpp .nu16 {color:#000080;}
.cpp.source-cpp .nu17 {color:#000080;}
.cpp.source-cpp .nu18 {color:#000080;}
.cpp.source-cpp .nu19 {color:#000080;}
.cpp.source-cpp .ln-xtra, .cpp.source-cpp li.ln-xtra, .cpp.source-cpp div.ln-xtra {background-color: #ffc;}
.cpp.source-cpp span.xtra { display:block; }

/*]]>*/
</style><style type="text/css">/*<![CDATA[*/
.source-text {line-height: normal;}
.source-text li, .source-text pre {
	line-height: normal; border: 0px none white;
}
/**
 * GeSHi Dynamically Generated Stylesheet
 * --------------------------------------
 * Dynamically generated stylesheet for text
 * CSS class: source-text, CSS id: 
 * GeSHi (C) 2004 - 2007 Nigel McNie, 2007 - 2008 Benny Baumann
 * (http://qbnz.com/highlighter/ and http://geshi.org/)
 * --------------------------------------
 */
.text.source-text .de1, .text.source-text .de2 {font: normal normal 1em/1.2em monospace; margin:0; padding:0; background:none; vertical-align:top;}
.text.source-text  {font-family:monospace;}
.text.source-text .imp {font-weight: bold; color: red;}
.text.source-text li, .text.source-text .li1 {font-weight: normal; vertical-align:top;}
.text.source-text .ln {width:1px;text-align:right;margin:0;padding:0 2px;vertical-align:top;}
.text.source-text .li2 {font-weight: bold; vertical-align:top;}
.text.source-text .ln-xtra, .text.source-text li.ln-xtra, .text.source-text div.ln-xtra {background-color: #ffc;}
.text.source-text span.xtra { display:block; }

/*]]>*/
</style><!--[if lt IE 7]><style type="text/css">body{behavior:url("/mwiki/skins/cppreference2/csshover.min.htc")}</style><![endif]--></head>
<body class="mediawiki ltr sitedir-ltr ns-0 ns-subject page-cpp_regex_regex_search skin-cppreference2 action-view cpp-navbar">
        <!-- header -->
        <!-- /header -->
        <!-- content -->
<div id="cpp-content-base">
            <div id="content">
                <a id="top"></a>
                <div id="mw-js-message" style="display:none;"></div>
                                <!-- firstHeading -->
<h1 id="firstHeading" class="firstHeading"><span style="font-size:0.7em; line-height:130%">std::</span>regex_search</h1>
                <!-- /firstHeading -->
                <!-- bodyContent -->
                <div id="bodyContent">
                                        <!-- tagline -->
                    <div id="siteSub">来自cppreference.com</div>
                    <!-- /tagline -->
                                        <!-- subtitle -->
                    <div id="contentSub"><span class="subpages">&lt; <a href="../../cpp.html" title="cpp">cpp</a>‎ | <a href="../regex.html" title="cpp/regex">regex</a></span></div>
                    <!-- /subtitle -->
                                                            <!-- bodycontent -->
                    <div id="mw-content-text" lang="zh" dir="ltr" class="mw-content-ltr"><div class="t-navbar" style=""><div class="t-navbar-sep"> </div><div class="t-navbar-head"><a href="../../cpp.html" title="cpp"> C++</a><div class="t-navbar-menu"><div><div><table class="t-nv-begin" cellpadding="0" style="line-height:1.1em;">
<tr class="t-nv"><td colspan="5"> <a href="../language.html" title="cpp/language">语言</a> </td></tr>
<tr class="t-nv"><td colspan="5"> <a href="../header.html" title="cpp/header">标准库头文件</a> </td></tr>
<tr class="t-nv"><td colspan="5"> <a href="../freestanding.html" title="cpp/freestanding"> 自立与有宿主实现</a> </td></tr>
<tr class="t-nv"><td colspan="5"> <a href="../named_req.html" title="cpp/named req">具名要求</a> </td></tr>
<tr class="t-nv"><td colspan="5"> <a href="../utility.html#.E8.AF.AD.E8.A8.80.E6.94.AF.E6.8C.81" title="cpp/utility">语言支持库</a> </td></tr>
<tr class="t-nv"><td colspan="5"> <a href="../concepts.html" title="cpp/concepts">概念库</a> <span class="t-mark-rev t-since-cxx20">(C++20)</span> </td></tr>
<tr class="t-nv"><td colspan="5"> <a href="../error.html" title="cpp/error">诊断库</a> </td></tr>
<tr class="t-nv"><td colspan="5"> <a href="../utility.html" title="cpp/utility">工具库</a> </td></tr>
<tr class="t-nv"><td colspan="5"> <a href="../string.html" title="cpp/string">字符串库</a> </td></tr>
<tr class="t-nv"><td colspan="5"> <a href="https://zh.cppreference.com/w/cpp/container" title="cpp/container">容器库</a> </td></tr>
<tr class="t-nv"><td colspan="5"> <a href="../iterator.html" title="cpp/iterator">迭代器库</a> </td></tr>
<tr class="t-nv"><td colspan="5"> <a href="../ranges.html" title="cpp/ranges"> 范围库</a> <span class="t-mark-rev t-since-cxx20">(C++20)</span> </td></tr>
<tr class="t-nv"><td colspan="5"> <a href="../algorithm.html" title="cpp/algorithm">算法库</a> </td></tr>
<tr class="t-nv"><td colspan="5"> <a href="../numeric.html" title="cpp/numeric">数值库</a> </td></tr>
<tr class="t-nv"><td colspan="5"> <a href="../io.html" title="cpp/io">输入/输出库</a> </td></tr>
<tr class="t-nv"><td colspan="5"> <a href="../locale.html" title="cpp/locale">本地化库</a> </td></tr>
<tr class="t-nv"><td colspan="5"> <a href="../regex.html" title="cpp/regex">正则表达式库</a> <span class="t-mark-rev t-since-cxx11">(C++11)</span> </td></tr>
<tr class="t-nv"><td colspan="5"> <a href="../atomic.html" title="cpp/atomic">原子操作库</a> <span class="t-mark-rev t-since-cxx11">(C++11)</span> </td></tr>
<tr class="t-nv"><td colspan="5"> <a href="../thread.html" title="cpp/thread">线程支持库</a> <span class="t-mark-rev t-since-cxx11">(C++11)</span> </td></tr>
<tr class="t-nv"><td colspan="5"> <a href="../filesystem.html" title="cpp/filesystem">文件系统库</a> <span class="t-mark-rev t-since-cxx17">(C++17)</span> </td></tr>
<tr class="t-nv"><td colspan="5"> <a href="../experimental.html" title="cpp/experimental">技术规范</a> </td></tr>
</table></div><div></div></div></div></div><div class="t-navbar-sep"> </div><div class="t-navbar-head"><a href="../regex.html" title="cpp/regex">正则表达式库</a><div class="t-navbar-menu"><div><div><table class="t-nv-begin" cellpadding="0" style="">
<tr class="t-nv-h1"><td colspan="5"> 类</td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="basic_regex.html" title="cpp/regex/basic regex"><span class="t-lines"><span>basic_regex</span></span></a></div><div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx11">(C++11)</span></span></span></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="sub_match.html" title="cpp/regex/sub match"><span class="t-lines"><span>sub_match</span></span></a></div><div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx11">(C++11)</span></span></span></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="match_results.html" title="cpp/regex/match results"><span class="t-lines"><span>match_results</span></span></a></div><div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx11">(C++11)</span></span></span></div></div></td></tr>
<tr class="t-nv-h1"><td colspan="5"> 算法</td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="regex_match.html" title="cpp/regex/regex match"><span class="t-lines"><span>regex_match</span></span></a></div><div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx11">(C++11)</span></span></span></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><strong class="selflink"><span class="t-lines"><span>regex_search</span></span></strong></div><div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx11">(C++11)</span></span></span></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="regex_replace.html" title="cpp/regex/regex replace"><span class="t-lines"><span>regex_replace</span></span></a></div><div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx11">(C++11)</span></span></span></div></div></td></tr>
<tr class="t-nv-h1"><td colspan="5"> 迭代器</td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="regex_iterator.html" title="cpp/regex/regex iterator"><span class="t-lines"><span>regex_iterator</span></span></a></div><div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx11">(C++11)</span></span></span></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="regex_token_iterator.html" title="cpp/regex/regex token iterator"><span class="t-lines"><span>regex_token_iterator</span></span></a></div><div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx11">(C++11)</span></span></span></div></div></td></tr>
<tr class="t-nv-h1"><td colspan="5"> 异常</td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="regex_error.html" title="cpp/regex/regex error"><span class="t-lines"><span>regex_error</span></span></a></div><div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx11">(C++11)</span></span></span></div></div></td></tr>
<tr class="t-nv-h1"><td colspan="5"> 特性</td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="regex_traits.html" title="cpp/regex/regex traits"><span class="t-lines"><span>regex_traits</span></span></a></div><div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx11">(C++11)</span></span></span></div></div></td></tr>
<tr class="t-nv-h1"><td colspan="5"> 常量</td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="syntax_option_type.html" title="cpp/regex/syntax option type"><span class="t-lines"><span>syntax_option_type</span></span></a></div><div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx11">(C++11)</span></span></span></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="match_flag_type.html" title="cpp/regex/match flag type"><span class="t-lines"><span>match_flag_type</span></span></a></div><div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx11">(C++11)</span></span></span></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="error_type.html" title="cpp/regex/error type"><span class="t-lines"><span>error_type</span></span></a></div><div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx11">(C++11)</span></span></span></div></div></td></tr>
<tr class="t-nv-h1"><td colspan="5"> 正则表达式文法</td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="ecmascript.html" title="cpp/regex/ecmascript"><span class="t-lines"><span>Modified ECMAScript-262</span></span></a></div><div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx11">(C++11)</span></span></span></div></div></td></tr>
</table></div><div></div></div></div></div><div class="t-navbar-sep"> </div></div>
<table class="t-dcl-begin"><tbody>
<tr class="t-dsc-header">
<td> <div>定义于头文件 <code><a href="../header/regex.html" title="cpp/header/regex">&lt;regex&gt;</a></code>
 </div></td>
<td></td>
<td></td>
</tr>
<tr class="t-dcl t-since-cxx11">
<td> <div><span class="mw-geshi cpp source-cpp"><span class="kw1">template</span><span class="sy1">&lt;</span> <span class="kw1">class</span> BidirIt, <br>
<p>          <span class="kw1">class</span> Alloc, <span class="kw1">class</span> CharT, <span class="kw1">class</span> Traits <span class="sy1">&gt;</span><br>
<span class="kw4">bool</span> regex_search<span class="br0">(</span> BidirIt first, BidirIt last,<br>
                   <a href="match_results.html"><span class="kw2007">std::<span class="me2">match_results</span></span></a><span class="sy1">&lt;</span>BidirIt,Alloc<span class="sy1">&gt;</span><span class="sy3">&amp;</span> m,<br>
                   <span class="kw4">const</span> <a href="http://zh.cppreference.com/w/cpp/regex/basic_regex"><span class="kw1999">std::<span class="me2">basic_regex</span></span></a><span class="sy1">&lt;</span>CharT,Traits<span class="sy1">&gt;</span><span class="sy3">&amp;</span> e,<br>
                   <a href="match_flag_type.html"><span class="kw2037">std::<span class="me2">regex_constants</span><span class="sy4">::</span><span class="me2">match_flag_type</span></span></a> flags <span class="sy1">=</span> <br>
</p>
                       <a href="match_flag_type.html"><span class="kw2038">std::<span class="me2">regex_constants</span><span class="sy4">::</span><span class="me2">match_default</span></span></a> <span class="br0">)</span><span class="sy4">;</span></span></div></td>
<td> (1) </td>
<td> <span class="t-mark-rev t-since-cxx11">(C++11 起)</span> </td>
</tr>
<tr class="t-dcl t-since-cxx11">
<td> <div><span class="mw-geshi cpp source-cpp"><span class="kw1">template</span><span class="sy1">&lt;</span> <span class="kw1">class</span> CharT, <span class="kw1">class</span> Alloc, <span class="kw1">class</span> Traits <span class="sy1">&gt;</span><br>
<p><span class="kw4">bool</span> regex_search<span class="br0">(</span> <span class="kw4">const</span> CharT<span class="sy2">*</span> str,<br>
                   <a href="match_results.html"><span class="kw2007">std::<span class="me2">match_results</span></span></a><span class="sy1">&lt;</span><span class="kw4">const</span> CharT<span class="sy2">*</span>,Alloc<span class="sy1">&gt;</span><span class="sy3">&amp;</span> m,<br>
                   <span class="kw4">const</span> <a href="http://zh.cppreference.com/w/cpp/regex/basic_regex"><span class="kw1999">std::<span class="me2">basic_regex</span></span></a><span class="sy1">&lt;</span>CharT,Traits<span class="sy1">&gt;</span><span class="sy3">&amp;</span> e,<br>
                   <a href="match_flag_type.html"><span class="kw2037">std::<span class="me2">regex_constants</span><span class="sy4">::</span><span class="me2">match_flag_type</span></span></a> flags <span class="sy1">=</span> <br>
</p>
                       <a href="match_flag_type.html"><span class="kw2038">std::<span class="me2">regex_constants</span><span class="sy4">::</span><span class="me2">match_default</span></span></a> <span class="br0">)</span><span class="sy4">;</span></span></div></td>
<td> (2) </td>
<td> <span class="t-mark-rev t-since-cxx11">(C++11 起)</span> </td>
</tr>
<tr class="t-dcl t-since-cxx11">
<td> <div><span class="mw-geshi cpp source-cpp"><span class="kw1">template</span><span class="sy1">&lt;</span> <span class="kw1">class</span> STraits, <span class="kw1">class</span> SAlloc,<br>
<p>          <span class="kw1">class</span> Alloc, <span class="kw1">class</span> CharT, <span class="kw1">class</span> Traits <span class="sy1">&gt;</span><br>
<span class="kw4">bool</span> regex_search<span class="br0">(</span> <span class="kw4">const</span> <a href="../string/basic_string.html"><span class="kw1228">std::<span class="me2">basic_string</span></span></a><span class="sy1">&lt;</span>CharT,STraits,SAlloc<span class="sy1">&gt;</span><span class="sy3">&amp;</span> s,<br>
                   <a href="match_results.html"><span class="kw2007">std::<span class="me2">match_results</span></span></a><span class="sy1">&lt;</span><br>
                       <span class="kw1">typename</span> <a href="../string/basic_string.html"><span class="kw1228">std::<span class="me2">basic_string</span></span></a><span class="sy1">&lt;</span>CharT,STraits,SAlloc<span class="sy1">&gt;</span><span class="sy4">::</span><span class="me2">const_iterator</span>, <br>
                       Alloc<br>
                   <span class="sy1">&gt;</span><span class="sy3">&amp;</span> m,<br>
                   <span class="kw4">const</span> <a href="http://zh.cppreference.com/w/cpp/regex/basic_regex"><span class="kw1999">std::<span class="me2">basic_regex</span></span></a><span class="sy1">&lt;</span>CharT, Traits<span class="sy1">&gt;</span><span class="sy3">&amp;</span> e,<br>
                   <a href="match_flag_type.html"><span class="kw2037">std::<span class="me2">regex_constants</span><span class="sy4">::</span><span class="me2">match_flag_type</span></span></a> flags <span class="sy1">=</span><br>
</p>
                       <a href="match_flag_type.html"><span class="kw2038">std::<span class="me2">regex_constants</span><span class="sy4">::</span><span class="me2">match_default</span></span></a> <span class="br0">)</span><span class="sy4">;</span></span></div></td>
<td> (3) </td>
<td> <span class="t-mark-rev t-since-cxx11">(C++11 起)</span> </td>
</tr>
<tr class="t-dcl t-since-cxx11">
<td> <div><span class="mw-geshi cpp source-cpp"><span class="kw1">template</span><span class="sy1">&lt;</span> <span class="kw1">class</span> BidirIt,<br>
<p>          <span class="kw1">class</span> CharT, <span class="kw1">class</span> Traits <span class="sy1">&gt;</span><br>
<span class="kw4">bool</span> regex_search<span class="br0">(</span> BidirIt first, BidirIt last,<br>
                   <span class="kw4">const</span> <a href="http://zh.cppreference.com/w/cpp/regex/basic_regex"><span class="kw1999">std::<span class="me2">basic_regex</span></span></a><span class="sy1">&lt;</span>CharT,Traits<span class="sy1">&gt;</span><span class="sy3">&amp;</span> e,<br>
                   <a href="match_flag_type.html"><span class="kw2037">std::<span class="me2">regex_constants</span><span class="sy4">::</span><span class="me2">match_flag_type</span></span></a> flags <span class="sy1">=</span> <br>
</p>
                       <a href="match_flag_type.html"><span class="kw2038">std::<span class="me2">regex_constants</span><span class="sy4">::</span><span class="me2">match_default</span></span></a> <span class="br0">)</span><span class="sy4">;</span></span></div></td>
<td> (4) </td>
<td> <span class="t-mark-rev t-since-cxx11">(C++11 起)</span> </td>
</tr>
<tr class="t-dcl t-since-cxx11">
<td> <div><span class="mw-geshi cpp source-cpp"><span class="kw1">template</span><span class="sy1">&lt;</span> <span class="kw1">class</span> CharT, <span class="kw1">class</span> Traits <span class="sy1">&gt;</span><br>
<p><span class="kw4">bool</span> regex_search<span class="br0">(</span> <span class="kw4">const</span> CharT<span class="sy2">*</span> str,<br>
                   <span class="kw4">const</span> <a href="http://zh.cppreference.com/w/cpp/regex/basic_regex"><span class="kw1999">std::<span class="me2">basic_regex</span></span></a><span class="sy1">&lt;</span>CharT,Traits<span class="sy1">&gt;</span><span class="sy3">&amp;</span> e,<br>
                   <a href="match_flag_type.html"><span class="kw2037">std::<span class="me2">regex_constants</span><span class="sy4">::</span><span class="me2">match_flag_type</span></span></a> flags <span class="sy1">=</span> <br>
</p>
                       <a href="match_flag_type.html"><span class="kw2038">std::<span class="me2">regex_constants</span><span class="sy4">::</span><span class="me2">match_default</span></span></a> <span class="br0">)</span><span class="sy4">;</span></span></div></td>
<td> (5) </td>
<td> <span class="t-mark-rev t-since-cxx11">(C++11 起)</span> </td>
</tr>
<tr class="t-dcl t-since-cxx11">
<td> <div><span class="mw-geshi cpp source-cpp"><span class="kw1">template</span><span class="sy1">&lt;</span> <span class="kw1">class</span> STraits, <span class="kw1">class</span> SAlloc,<br>
<p>          <span class="kw1">class</span> CharT, <span class="kw1">class</span> Traits <span class="sy1">&gt;</span><br>
<span class="kw4">bool</span> regex_search<span class="br0">(</span> <span class="kw4">const</span> <a href="../string/basic_string.html"><span class="kw1228">std::<span class="me2">basic_string</span></span></a><span class="sy1">&lt;</span>CharT,STraits,SAlloc<span class="sy1">&gt;</span><span class="sy3">&amp;</span> s,<br>
                   <span class="kw4">const</span> <a href="http://zh.cppreference.com/w/cpp/regex/basic_regex"><span class="kw1999">std::<span class="me2">basic_regex</span></span></a><span class="sy1">&lt;</span>CharT,Traits<span class="sy1">&gt;</span><span class="sy3">&amp;</span> e,<br>
                   <a href="match_flag_type.html"><span class="kw2037">std::<span class="me2">regex_constants</span><span class="sy4">::</span><span class="me2">match_flag_type</span></span></a> flags <span class="sy1">=</span> <br>
</p>
                       <a href="match_flag_type.html"><span class="kw2038">std::<span class="me2">regex_constants</span><span class="sy4">::</span><span class="me2">match_default</span></span></a> <span class="br0">)</span><span class="sy4">;</span></span></div></td>
<td> (6) </td>
<td> <span class="t-mark-rev t-since-cxx11">(C++11 起)</span> </td>
</tr>
<tr class="t-dcl t-since-cxx14">
<td> <div><span class="mw-geshi cpp source-cpp"><span class="kw1">template</span><span class="sy1">&lt;</span> <span class="kw1">class</span> STraits, <span class="kw1">class</span> SAlloc,<br>
<p>          <span class="kw1">class</span> Alloc, <span class="kw1">class</span> CharT, <span class="kw1">class</span> Traits <span class="sy1">&gt;</span><br>
<span class="kw4">bool</span> regex_search<span class="br0">(</span> <span class="kw4">const</span> <a href="../string/basic_string.html"><span class="kw1228">std::<span class="me2">basic_string</span></span></a><span class="sy1">&lt;</span>CharT,STraits,SAlloc<span class="sy1">&gt;</span><span class="sy3">&amp;&amp;</span>,<br>
                   <a href="match_results.html"><span class="kw2007">std::<span class="me2">match_results</span></span></a><span class="sy1">&lt;</span><br>
                       <span class="kw1">typename</span> <a href="../string/basic_string.html"><span class="kw1228">std::<span class="me2">basic_string</span></span></a><span class="sy1">&lt;</span>CharT,STraits,SAlloc<span class="sy1">&gt;</span><span class="sy4">::</span><span class="me2">const_iterator</span>, <br>
                       Alloc<br>
                   <span class="sy1">&gt;</span><span class="sy3">&amp;</span>,<br>
                   <span class="kw4">const</span> <a href="http://zh.cppreference.com/w/cpp/regex/basic_regex"><span class="kw1999">std::<span class="me2">basic_regex</span></span></a><span class="sy1">&lt;</span>CharT, Traits<span class="sy1">&gt;</span><span class="sy3">&amp;</span>,<br>
                   <a href="match_flag_type.html"><span class="kw2037">std::<span class="me2">regex_constants</span><span class="sy4">::</span><span class="me2">match_flag_type</span></span></a> flags <span class="sy1">=</span><br>
</p>
                       <a href="match_flag_type.html"><span class="kw2038">std::<span class="me2">regex_constants</span><span class="sy4">::</span><span class="me2">match_default</span></span></a> <span class="br0">)</span> <span class="sy1">=</span> delete<span class="sy4">;</span></span></div></td>
<td> (7) </td>
<td> <span class="t-mark-rev t-since-cxx14">(C++14 起)</span> </td>
</tr>
<tr class="t-dcl-sep"><td></td><td></td><td></td></tr>
</tbody></table>
<p>确定正则表达式 <code>e</code> 和目标字符序列中的某个子序列间是否有匹配。
</p>
<div class="t-li1"><span class="t-li">1)</span> 分析泛型范围 <code>[first,last)</code> 。返回匹配结果于 <code>m</code> 。</div>
<div class="t-li1"><span class="t-li">2)</span> 分析 <code>str</code> 所指向的空终止字符串。返回匹配结果于 <code>m</code> 。</div>
<div class="t-li1"><span class="t-li">3)</span> 分析 string <code>s</code> 。返回匹配结果于 <code>m</code> 。</div>
<div class="t-li1"><span class="t-li">4-6)</span> 等价于 (1-3) ，只是省略匹配结果。</div>
<div class="t-li1"><span class="t-li">7)</span> 禁止重载 3 接受临时字符串，否则此函数将以立即变为非法的 string 迭代器填充 match_results m 。</div>
<p><code>regex_search</code> 将成功地匹配给定序列的任何子序列，相对地 <span class="t-lc"><a href="regex_match.html" title="cpp/regex/regex match">std::regex_match</a></span> 仅若正则表达式匹配<i>整个</i>序列才返回 <span class="t-c"><span class="mw-geshi cpp source-cpp"><span class="kw2">true</span></span></span> 。
</p>
<h3><span class="mw-headline" id=".E5.8F.82.E6.95.B0">参数</span></h3>
<table class="t-par-begin">


<tr class="t-par">
<td>  first, last
</td>
<td> -
</td>
<td> 标识目标字符序列的范围
</td></tr>
<tr class="t-par">
<td>  str
</td>
<td> -
</td>
<td> 指向空终止字符序列的指针
</td></tr>
<tr class="t-par">
<td>  s
</td>
<td> -
</td>
<td> 标识目标字符序列的指针
</td></tr>
<tr class="t-par">
<td>  e
</td>
<td> -
</td>
<td> 应当应用到目标字符序列的 <span class="t-lc"><a href="basic_regex.html" title="cpp/regex/basic regex">std::regex</a></span>
</td></tr>
<tr class="t-par">
<td>  m
</td>
<td> -
</td>
<td> 匹配结果
</td></tr>
<tr class="t-par">
<td>  flags
</td>
<td> -
</td>
<td> 掌管搜索行为的 <span class="t-lc"><a href="match_flag_type.html" title="cpp/regex/match flag type">std::regex_constants::match_flag_type</a></span>
</td></tr>
<tr class="t-par-hitem">
<td colspan="3"> 类型要求
</td></tr>
<tr class="t-par-req">
<td colspan="3"> -<div class="spacer"></div><code>BidirIt</code> 必须满足<a href="../named_req/BidirectionalIterator.html" title="cpp/named req/BidirectionalIterator"><i>遗留双向迭代器</i> <span style="font-family: Georgia, 'DejaVu Serif', serif; font-style:italic">(LegacyBidirectionalIterator)</span> </a> 的要求。
</td></tr>
<tr class="t-par-req">
<td colspan="3"> -<div class="spacer"></div><code>Alloc</code> 必须满足<a href="../named_req/Allocator.html" title="cpp/named req/Allocator"><i>分配器</i> <span style="font-family: Georgia, 'DejaVu Serif', serif; font-style:italic">(Allocator)</span> </a> 的要求。
</td></tr></table>
<h3><span class="mw-headline" id=".E8.BF.94.E5.9B.9E.E5.80.BC">返回值</span></h3>
<p>若匹配存在则返回 <span class="t-c"><span class="mw-geshi cpp source-cpp"><span class="kw2">true</span></span></span> ，否则返回 <span class="t-c"><span class="mw-geshi cpp source-cpp"><span class="kw2">false</span></span></span> 。任一情况下，更新对象 <code>m</code> 如下：
</p><p>若匹配不存在：
</p>
<table class="t-dsc-begin">

<tr class="t-dsc">
<td colspan="2">  <span class="t-c"><span class="mw-geshi cpp source-cpp">m.<span class="me1">ready</span><span class="br0">(</span><span class="br0">)</span> <span class="sy1">==</span> <span class="kw2">true</span></span></span>
</td></tr>

<tr class="t-dsc">
<td colspan="2">  <span class="t-c"><span class="mw-geshi cpp source-cpp">m.<span class="me1">empty</span><span class="br0">(</span><span class="br0">)</span> <span class="sy1">==</span> <span class="kw2">true</span></span></span>
</td></tr>

<tr class="t-dsc">
<td colspan="2">  <span class="t-c"><span class="mw-geshi cpp source-cpp">m.<span class="me1">size</span><span class="br0">(</span><span class="br0">)</span> <span class="sy1">==</span> <span class="nu0">0</span></span></span>
</td></tr>
</table>
<p>若匹配存在：
</p>
<table class="t-dsc-begin">

<tr class="t-dsc">
<td>  <span class="t-c"><span class="mw-geshi cpp source-cpp">m.<span class="me1">ready</span><span class="br0">(</span><span class="br0">)</span></span></span>
</td>
<td>  <span class="t-c"><span class="mw-geshi cpp source-cpp"><span class="kw2">true</span></span></span>
</td></tr>

<tr class="t-dsc">
<td>  <span class="t-c"><span class="mw-geshi cpp source-cpp">m.<span class="me1">empty</span><span class="br0">(</span><span class="br0">)</span></span></span>
</td>
<td>  <span class="t-c"><span class="mw-geshi cpp source-cpp"><span class="kw2">false</span></span></span>
</td></tr>

<tr class="t-dsc">
<td>  <span class="t-c"><span class="mw-geshi cpp source-cpp">m.<span class="me1">size</span><span class="br0">(</span><span class="br0">)</span></span></span>
</td>
<td> <a href="ecmascript.html#.E5.AD.90.E8.A1.A8.E8.BE.BE.E5.BC.8F" title="cpp/regex/ecmascript">有标记子表达式</a>的数量加 1 ，即 <span class="t-c"><span class="mw-geshi cpp source-cpp"><span class="nu0">1</span><span class="sy2">+</span>e.<span class="me1">mark_count</span><span class="br0">(</span><span class="br0">)</span></span></span>
</td></tr>

<tr class="t-dsc">
<td>  <span class="t-c"><span class="mw-geshi cpp source-cpp">m.<span class="me1">prefix</span><span class="br0">(</span><span class="br0">)</span>.<span class="me1">first</span></span></span>
</td>
<td>  <code>first</code>
</td></tr>

<tr class="t-dsc">
<td>  <span class="t-c"><span class="mw-geshi cpp source-cpp">m.<span class="me1">prefix</span><span class="br0">(</span><span class="br0">)</span>.<span class="me1">second</span></span></span>
</td>
<td>  <span class="t-c"><span class="mw-geshi cpp source-cpp">m<span class="br0">[</span><span class="nu0">0</span><span class="br0">]</span>.<span class="me1">first</span></span></span>
</td></tr>

<tr class="t-dsc">
<td>  <span class="t-c"><span class="mw-geshi cpp source-cpp">m.<span class="me1">prefix</span><span class="br0">(</span><span class="br0">)</span>.<span class="me1">matched</span></span></span>
</td>
<td>  <span class="t-c"><span class="mw-geshi cpp source-cpp">m.<span class="me1">prefix</span><span class="br0">(</span><span class="br0">)</span>.<span class="me1">first</span> <span class="sy3">!</span><span class="sy1">=</span> m.<span class="me1">prefix</span><span class="br0">(</span><span class="br0">)</span>.<span class="me1">second</span></span></span>
</td></tr>

<tr class="t-dsc">
<td>  <span class="t-c"><span class="mw-geshi cpp source-cpp">m.<span class="me1">suffix</span><span class="br0">(</span><span class="br0">)</span>.<span class="me1">first</span></span></span>
</td>
<td>  <span class="t-c"><span class="mw-geshi cpp source-cpp">m<span class="br0">[</span><span class="nu0">0</span><span class="br0">]</span>.<span class="me1">second</span></span></span>
</td></tr>

<tr class="t-dsc">
<td>  <span class="t-c"><span class="mw-geshi cpp source-cpp">m.<span class="me1">suffix</span><span class="br0">(</span><span class="br0">)</span>.<span class="me1">second</span></span></span>
</td>
<td>  <code>last</code>
</td></tr>

<tr class="t-dsc">
<td>  <span class="t-c"><span class="mw-geshi cpp source-cpp">m.<span class="me1">suffix</span><span class="br0">(</span><span class="br0">)</span>.<span class="me1">matched</span></span></span>
</td>
<td>  <span class="t-c"><span class="mw-geshi cpp source-cpp">m.<span class="me1">suffix</span><span class="br0">(</span><span class="br0">)</span>.<span class="me1">first</span> <span class="sy3">!</span><span class="sy1">=</span> m.<span class="me1">suffix</span><span class="br0">(</span><span class="br0">)</span>.<span class="me1">second</span></span></span>
</td></tr>

<tr class="t-dsc">
<td>  <span class="t-c"><span class="mw-geshi cpp source-cpp">m<span class="br0">[</span><span class="nu0">0</span><span class="br0">]</span>.<span class="me1">first</span></span></span>
</td>
<td> 匹配序列的起始
</td></tr>

<tr class="t-dsc">
<td>  <span class="t-c"><span class="mw-geshi cpp source-cpp">m<span class="br0">[</span><span class="nu0">0</span><span class="br0">]</span>.<span class="me1">second</span></span></span>
</td>
<td> 匹配数列的结尾
</td></tr>

<tr class="t-dsc">
<td>  <span class="t-c"><span class="mw-geshi cpp source-cpp">m<span class="br0">[</span><span class="nu0">0</span><span class="br0">]</span>.<span class="me1">matched</span></span></span>
</td>
<td>  <span class="t-c"><span class="mw-geshi cpp source-cpp"><span class="kw2">true</span></span></span>
</td></tr>

<tr class="t-dsc">
<td>  <span class="t-c"><span class="mw-geshi cpp source-cpp">m<span class="br0">[</span>n<span class="br0">]</span>.<span class="me1">first</span></span></span>
</td>
<td> 匹配<a href="ecmascript.html#.E5.AD.90.E8.A1.A8.E8.BE.BE.E5.BC.8F" title="cpp/regex/ecmascript">有标记子表达式</a> n 的序列的起始，或若子表达式不参与匹配则为 <code>last</code>
</td></tr>

<tr class="t-dsc">
<td>  <span class="t-c"><span class="mw-geshi cpp source-cpp">m<span class="br0">[</span>n<span class="br0">]</span>.<span class="me1">second</span></span></span>
</td>
<td> 匹配<a href="ecmascript.html#.E5.AD.90.E8.A1.A8.E8.BE.BE.E5.BC.8F" title="cpp/regex/ecmascript">有标记子表达式</a> n 的序列的结尾，或若子表达式不参与匹配则为 <code>last</code>
</td></tr>

<tr class="t-dsc">
<td>  <span class="t-c"><span class="mw-geshi cpp source-cpp">m<span class="br0">[</span>n<span class="br0">]</span>.<span class="me1">matched</span></span></span>
</td>
<td> 若子表达式 n 参与匹配则为 <span class="t-c"><span class="mw-geshi cpp source-cpp"><span class="kw2">true</span></span></span> ，否则为 <span class="t-c"><span class="mw-geshi cpp source-cpp"><span class="kw2">false</span></span></span>
</td></tr>
</table>
<h3><span class="mw-headline" id=".E6.B3.A8.E6.84.8F">注意</span></h3>
<p>为在目标序列内检验所有匹配，可在循环中调用 <code>std::regex_search</code> ，每次从先前调用的 <code>m[0].second</code> 重新开始。 <span class="t-lc"><a href="regex_iterator.html" title="cpp/regex/regex iterator">std::regex_iterator</a></span> 提供对此迭代的简易接口。
</p>
<h3><span class="mw-headline" id=".E7.A4.BA.E4.BE.8B">示例</span></h3>
<div class="t-example"><div class="t-example-live-link"><div class="coliru-btn coliru-btn-run-init">运行此代码</div></div>
<div dir="ltr" class="mw-geshi" style="text-align: left;"><div class="cpp source-cpp"><pre class="de1"><span class="co2">#include &lt;iostream&gt;</span>
<span class="co2">#include &lt;string&gt;</span>
<span class="co2">#include &lt;regex&gt;</span>
 
<span class="kw4">int</span> main<span class="br0">(</span><span class="br0">)</span>
<span class="br0">{</span>
    <a href="../string/basic_string.html"><span class="kw1230">std::<span class="me2">string</span></span></a> lines<span class="br0">[</span><span class="br0">]</span> <span class="sy1">=</span> <span class="br0">{</span><span class="st0">"Roses are #ff0000"</span>,
                           <span class="st0">"violets are #0000ff"</span>,
                           <span class="st0">"all of my base are belong to you"</span><span class="br0">}</span><span class="sy4">;</span>
 
    <a href="http://zh.cppreference.com/w/cpp/regex/basic_regex"><span class="kw2000">std::<span class="me2">regex</span></span></a> color_regex<span class="br0">(</span><span class="st0">"#([a-f0-9]{2})"</span>
                            <span class="st0">"([a-f0-9]{2})"</span>
                            <span class="st0">"([a-f0-9]{2})"</span><span class="br0">)</span><span class="sy4">;</span>
 
    <span class="co1">// 简单匹配</span>
    <span class="kw1">for</span> <span class="br0">(</span><span class="kw4">const</span> <span class="kw4">auto</span> <span class="sy3">&amp;</span>line <span class="sy4">:</span> lines<span class="br0">)</span> <span class="br0">{</span>
        <a href="../io/cout.html"><span class="kw1758">std::<span class="me2">cout</span></span></a> <span class="sy1">&lt;&lt;</span> line <span class="sy1">&lt;&lt;</span> <span class="st0">": "</span> <span class="sy1">&lt;&lt;</span> <a href="../io/manip/boolalpha.html"><span class="kw1764">std::<span class="me2">boolalpha</span></span></a>
                  <span class="sy1">&lt;&lt;</span> std<span class="sy4">::</span><span class="me2">regex_search</span><span class="br0">(</span>line, color_regex<span class="br0">)</span> <span class="sy1">&lt;&lt;</span> <span class="st0">'<span class="es1">\n</span>'</span><span class="sy4">;</span>
    <span class="br0">}</span>   
    <a href="../io/cout.html"><span class="kw1758">std::<span class="me2">cout</span></span></a> <span class="sy1">&lt;&lt;</span> <span class="st0">'<span class="es1">\n</span>'</span><span class="sy4">;</span>
 
    <span class="co1">// 展示每个匹配中有标记子表达式的内容</span>
    <a href="match_results.html"><span class="kw2010">std::<span class="me2">smatch</span></span></a> color_match<span class="sy4">;</span>
    <span class="kw1">for</span> <span class="br0">(</span><span class="kw4">const</span> <span class="kw4">auto</span><span class="sy3">&amp;</span> line <span class="sy4">:</span> lines<span class="br0">)</span> <span class="br0">{</span>
        <span class="kw1">if</span><span class="br0">(</span>std<span class="sy4">::</span><span class="me2">regex_search</span><span class="br0">(</span>line, color_match, color_regex<span class="br0">)</span><span class="br0">)</span> <span class="br0">{</span>
            <a href="../io/cout.html"><span class="kw1758">std::<span class="me2">cout</span></span></a> <span class="sy1">&lt;&lt;</span> <span class="st0">"matches for '"</span> <span class="sy1">&lt;&lt;</span> line <span class="sy1">&lt;&lt;</span> <span class="st0">"'<span class="es1">\n</span>"</span><span class="sy4">;</span>
            <a href="../io/cout.html"><span class="kw1758">std::<span class="me2">cout</span></span></a> <span class="sy1">&lt;&lt;</span> <span class="st0">"Prefix: '"</span> <span class="sy1">&lt;&lt;</span> color_match.<span class="me1">prefix</span><span class="br0">(</span><span class="br0">)</span> <span class="sy1">&lt;&lt;</span> <span class="st0">"'<span class="es1">\n</span>"</span><span class="sy4">;</span>
            <span class="kw1">for</span> <span class="br0">(</span>size_t i <span class="sy1">=</span> <span class="nu0">0</span><span class="sy4">;</span> i <span class="sy1">&lt;</span> color_match.<span class="me1">size</span><span class="br0">(</span><span class="br0">)</span><span class="sy4">;</span> <span class="sy2">++</span>i<span class="br0">)</span> 
                <a href="../io/cout.html"><span class="kw1758">std::<span class="me2">cout</span></span></a> <span class="sy1">&lt;&lt;</span> i <span class="sy1">&lt;&lt;</span> <span class="st0">": "</span> <span class="sy1">&lt;&lt;</span> color_match<span class="br0">[</span>i<span class="br0">]</span> <span class="sy1">&lt;&lt;</span> <span class="st0">'<span class="es1">\n</span>'</span><span class="sy4">;</span>
            <a href="../io/cout.html"><span class="kw1758">std::<span class="me2">cout</span></span></a> <span class="sy1">&lt;&lt;</span> <span class="st0">"Suffix: '"</span> <span class="sy1">&lt;&lt;</span> color_match.<span class="me1">suffix</span><span class="br0">(</span><span class="br0">)</span> <span class="sy1">&lt;&lt;</span> <span class="st0">"<span class="es1">\'</span><span class="es1">\n</span><span class="es1">\n</span>"</span><span class="sy4">;</span>
        <span class="br0">}</span>
    <span class="br0">}</span>
 
    <span class="co1">// 重复搜索（参阅 std::regex_iterator ）</span>
    <a href="../string/basic_string.html"><span class="kw1230">std::<span class="me2">string</span></span></a> log<span class="br0">(</span>R<span class="st0">"(
        Speed:	366
        Mass:	35
        Speed:	378
        Mass:	32
        Speed:	400
	Mass:	30)"</span><span class="br0">)</span><span class="sy4">;</span>
    <a href="http://zh.cppreference.com/w/cpp/regex/basic_regex"><span class="kw2000">std::<span class="me2">regex</span></span></a> r<span class="br0">(</span>R<span class="st0">"(Speed:<span class="es1">\t</span>\d*)"</span><span class="br0">)</span><span class="sy4">;</span>
    <a href="match_results.html"><span class="kw2010">std::<span class="me2">smatch</span></span></a> sm<span class="sy4">;</span>
    <span class="kw1">while</span><span class="br0">(</span>regex_search<span class="br0">(</span>log, sm, r<span class="br0">)</span><span class="br0">)</span>
    <span class="br0">{</span>
        <a href="../io/cout.html"><span class="kw1758">std::<span class="me2">cout</span></span></a> <span class="sy1">&lt;&lt;</span> sm.<span class="me1">str</span><span class="br0">(</span><span class="br0">)</span> <span class="sy1">&lt;&lt;</span> <span class="st0">'<span class="es1">\n</span>'</span><span class="sy4">;</span>
        log <span class="sy1">=</span> sm.<span class="me1">suffix</span><span class="br0">(</span><span class="br0">)</span><span class="sy4">;</span>
    <span class="br0">}</span>
 
    <span class="co1">// C 风格字符串演示</span>
    <a href="match_results.html"><span class="kw2008">std::<span class="me2">cmatch</span></span></a> cm<span class="sy4">;</span>
    <span class="kw1">if</span><span class="br0">(</span>std<span class="sy4">::</span><span class="me2">regex_search</span><span class="br0">(</span><span class="st0">"this is a test"</span>, cm, <a href="http://zh.cppreference.com/w/cpp/regex/basic_regex"><span class="kw2000">std::<span class="me2">regex</span></span></a><span class="br0">(</span><span class="st0">"test"</span><span class="br0">)</span><span class="br0">)</span><span class="br0">)</span> 
        <a href="../io/cout.html"><span class="kw1758">std::<span class="me2">cout</span></span></a> <span class="sy1">&lt;&lt;</span> <span class="st0">"<span class="es1">\n</span>Found "</span> <span class="sy1">&lt;&lt;</span> cm<span class="br0">[</span><span class="nu0">0</span><span class="br0">]</span> <span class="sy1">&lt;&lt;</span> <span class="st0">" at position "</span> <span class="sy1">&lt;&lt;</span> cm.<span class="me1">prefix</span><span class="br0">(</span><span class="br0">)</span>.<span class="me1">length</span><span class="br0">(</span><span class="br0">)</span><span class="sy4">;</span>
<span class="br0">}</span></pre></div></div>
<p>输出：
</p>
<div dir="ltr" class="mw-geshi" style="text-align: left;"><div class="text source-text"><pre class="de1">Roses are #ff0000: true
violets are #0000ff: true
all of my base are belong to you: false
 
matches for 'Roses are #ff0000'
Prefix: 'Roses are '
0: #ff0000
1: ff
2: 00
3: 00
Suffix: ''
 
matches for 'violets are #0000ff'
Prefix: 'violets are '
0: #0000ff
1: 00
2: 00
3: ff
Suffix: ''
 
Speed:	366
Speed:	378
Speed:	400
 
Found test at position 10</pre></div></div> 
</div>
<h3><span class="mw-headline" id=".E5.8F.82.E9.98.85">参阅</span></h3>
<table class="t-dsc-begin">

<tr class="t-dsc">
<td>  <div class="t-dsc-member-div"><div><a href="basic_regex.html" title="cpp/regex/basic regex"> <span class="t-lines"><span>basic_regex</span></span></a></div><div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx11">(C++11)</span></span></span></div></div>
</td>
<td>  正则表达式对象 <br> <span class="t-mark">(类模板)</span> </td></tr>

<tr class="t-dsc">
<td>  <div class="t-dsc-member-div"><div><a href="match_results.html" title="cpp/regex/match results"> <span class="t-lines"><span>match_results</span></span></a></div><div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx11">(C++11)</span></span></span></div></div>
</td>
<td>  标识一个正则表达式匹配，包含所有子表达式匹配 <br> <span class="t-mark">(类模板)</span> </td></tr>

<tr class="t-dsc">
<td>  <div class="t-dsc-member-div"><div><a href="regex_match.html" title="cpp/regex/regex match"> <span class="t-lines"><span>regex_match</span></span></a></div><div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx11">(C++11)</span></span></span></div></div>
</td>
<td>  尝试匹配一个正则表达式到整个字符序列 <br> <span class="t-mark">(函数模板)</span> </td></tr>
</table>

<!-- 
NewPP limit report
Preprocessor visited node count: 4701/1000000
Preprocessor generated node count: 10020/1000000
Post‐expand include size: 96435/2097152 bytes
Template argument size: 31663/2097152 bytes
Highest expansion depth: 25/40
Expensive parser function count: 0/100
-->

<!-- Saved in parser cache with key mwiki1-mwiki_zh_:pcache:idhash:3535-0!*!0!!zh!*!zh!* and timestamp 20200207091526 -->
</div>                    <!-- /bodycontent -->
                                        <!-- printfooter -->
                    <div class="printfooter">
                    来自“<a href="https://zh.cppreference.com/mwiki/index.php?title=cpp/regex/regex_search&amp;oldid=55766">https://zh.cppreference.com/mwiki/index.php?title=cpp/regex/regex_search&amp;oldid=55766</a>”                    </div>
                    <!-- /printfooter -->
                                                            <!-- catlinks -->
                    <!-- /catlinks -->
                                                            <div class="visualClear"></div>
                    <!-- debughtml -->
                                        <!-- /debughtml -->
                </div>
                <!-- /bodyContent -->
            </div>
        </div>
        <!-- /content -->
        <!-- footer -->
        <div id="cpp-footer-base" class="noprint">
            <div id="footer">
                        <div id="cpp-navigation">
            <h5>导航</h5>
            <ul><li><a href="https://zh.cppreference.com/w/cpp/regex/regex_search">Online version</a></li><li>Offline version retrieved 2020-03-14 18:00.</li></ul></div>
                        <ul id="footer-info">
                                    <li id="footer-info-lastmod"> 本页面最后修改于2018年6月16日 (星期六) 03:50。</li>
                                    <li id="footer-info-viewcount">此页面已被浏览过7,841次。</li>
                            </ul>
                    </div>
        </div>
        <!-- /footer -->
        <script>if(window.mw){
mw.loader.state({"site":"loading","user":"missing","user.groups":"ready"});
}</script>
<script src="../../../common/skin_scripts.js"></script>
<script>if(window.mw){
mw.loader.load(["mediawiki.action.view.postEdit","mediawiki.user","mediawiki.page.ready","mediawiki.searchSuggest","mediawiki.hidpi","ext.gadget.MathJax","ext.gadget.ColiruCompiler"], null, true);
}</script>
<script src="../../../common/site_scripts.js"></script>
<script type="text/javascript">
var _gaq = _gaq || [];
_gaq.push(['_setAccount', 'UA-2828341-1']);
_gaq.push(['_setDomainName', 'cppreference.com']);
_gaq.push(['_trackPageview']);
</script><!-- Served in 2.399 secs. -->
	</body>
<!-- Cached 20200207091526 -->
</html>